WO2021066324A1 - Procédé de réglage d'un état de miroir entre un dispositif maître et un dispositif client, et dispositif électronique pour la mise en œuvre de ce procédé - Google Patents

Procédé de réglage d'un état de miroir entre un dispositif maître et un dispositif client, et dispositif électronique pour la mise en œuvre de ce procédé Download PDF

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Publication number
WO2021066324A1
WO2021066324A1 PCT/KR2020/011300 KR2020011300W WO2021066324A1 WO 2021066324 A1 WO2021066324 A1 WO 2021066324A1 KR 2020011300 W KR2020011300 W KR 2020011300W WO 2021066324 A1 WO2021066324 A1 WO 2021066324A1
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Prior art keywords
pin
mirroring
connection
communication
master device
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PCT/KR2020/011300
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English (en)
Korean (ko)
Inventor
김용구
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삼성전자(주)
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Publication of WO2021066324A1 publication Critical patent/WO2021066324A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1438—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using more than one graphics controller
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/04—Display device controller operating with a plurality of display units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline

Definitions

  • the present invention relates to a method for setting a mirroring state for sharing a display screen between a master device such as a mobile phone and a client device such as a TV or LFD, and an electronic device performing the method.
  • the mirroring technology allows a plurality of devices to share and manipulate data displayed on the screen. For example, if you use mirroring technology, you can stream a movie using a tablet PC and play it on a TV in the living room.
  • a user In order to use mirroring, a user must connect a plurality of devices to enable the mutual mirroring function to be executed. For example, to perform screen mirroring between the user terminal and the TV or LFD (Large Format Display), use a screen mirroring source built into a TV or LFD, or use a separate external wired/wireless mirroring device. Should be connected.
  • the Miracast or external mirroring device built into the TV/LFD the user must change the source of the TV/LFD. If the built-in Miracast or external mirroring device is used at the same time, the user must change the source of the built-in Miracast and the external mirroring device from time to time. In addition, even if more than one source of the external mirroring device is used, the source must be changed from time to time.
  • An object of the present invention is to provide a method for easily connecting and disconnecting for mirroring between a client device such as a TV or LFD and a master device composed of a user terminal such as a mobile phone.
  • the present invention is a method for setting a mirroring state between a master device and a client device, comprising: a) detecting a connection for mirroring from the master device to some of a plurality of pins in a communication port provided in the client device. Setting a mirroring pin to be used for; And b) when a predetermined signal is input to the mirroring pin from a connection device connected to the communication port, detecting, by the client device, as a connection for mirroring to the connection device. Provides a method of setting the state.
  • the mirroring pin is composed of a reserved pin that is not used for data communication, power supply, or clock signal transmission among the plurality of pins.
  • connection device As an example, as the connection device is connected to the communication port, a power supply pin of the communication port may be short-circuited with the extra pin by the connection device to supply power to the extra pin.
  • the mirroring pin may be configured as an N/C pin, a CEC pin, a Hot Plug Detect pin, or a TDMS pin.
  • the predetermined signal may be included in a header block of a data packet input through the CEC pin.
  • the predetermined signal may be configured to be included in an unused logical address in the header block, and may be expressed by including a value not used in the EOM/ACK in the EOM/ACK field of the header block, It may be configured to be included in a separate bit added in the header block.
  • the method for setting a mirroring state of the present invention includes the steps of: c) displaying, by the client device, one or more communication ports that are mirrorably connected to the one or more master devices from the communication ports that are not mirrorably connected; It may be configured to further include.
  • the method for setting a mirroring state of the present invention may further include: d) displaying a display screen of the master device connected to the communication port on a display unit of the client device.
  • the step d) is preferably configured to be performed as the selection of the communication port is input to the client device.
  • the display screens of the plurality of master devices may be simultaneously displayed on the display unit.
  • a communication unit having a communication port to which a connection device is connected to enable data communication with a master device; And when a predetermined signal is input to the communication unit by the connection device as the connection device is connected to the communication port or by the master device connected through the connection device, the master device is connected in a mirrorable manner.
  • An electronic device including a; control unit set to be provided. The control unit sets some of the plurality of pins in the communication port as a mirroring pin used to detect a connection for mirroring from the master device, and when a predetermined signal is input to the mirroring pin, the master device Is detected as a connection for mirroring.
  • a connection for mirroring between a master device and a client device is automatically established by connecting a cable to a communication port of a client device such as a TV or LFD or by connecting the cable and the master device. Accordingly, there is no need for a user to manually change the source of the client device every time the master device is changed.
  • the user can easily inquire the communication ports connected to the client device so that the master device can be mirrored, and display the display screen of the connected master device through the display unit of the client by selecting the communication port in the inquiry state. Accordingly, the user's convenience in setting and using mirroring is very high.
  • FIG. 1 is a diagram showing a master device and a client device to which a method for setting a mirroring state according to the present invention is applied.
  • FIG. 2 is a diagram showing a configuration of pins of an HDMI port.
  • FIG. 3 is a diagram illustrating a signal input to pin 14 when a cable is connected to the HDMI port of FIG. 2;
  • FIG. 4 is a diagram showing a state in which the HDMI port of FIG. 2 is configured to implement the present invention as a first embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a state in which a cable is connected to the HDMI port of FIG. 4.
  • FIG. 6 is a diagram illustrating a signal input to pin 14 of the HDMI port of FIG. 2 in the state of FIG. 5;
  • Fig. 7 is a diagram for explaining a second embodiment of the present invention.
  • Fig. 8 is a diagram for explaining another modified example of the second embodiment.
  • Fig. 9 is a diagram for explaining still another modified example of the second embodiment.
  • FIGS. 10 and 11 are diagrams for explaining a third embodiment of the present invention.
  • FIG. 14 is a diagram showing a mirror connection state for each communication port displayed on a display unit of a client device.
  • FIG. 15 is a diagram showing a state in which a display screen of a communication port selected in FIG. 14 is displayed on a display unit of a client device.
  • 16 is a diagram illustrating a state in which display screens of a plurality of master devices, each connected to a plurality of communication ports, are simultaneously displayed on a display unit of a client device.
  • the master device sends the screen itself to the client device as it is, and the client device displays the screen received from the master device as it is.
  • the master device may be, for example, a tablet or a smartphone, and the client device may be, for example, a TV or a display device such as a Large Format Display (LFD).
  • LFD Large Format Display
  • the master device and the client device are not limited to these.
  • the device connecting the master device and the client device is referred to as a connecting device.
  • the connection device is a device that provides a path for data communication between a master device and a client device, and may be a wired device or a wireless device.
  • a data transmission/reception cable such as an HDMI cable may be used, and in the case of a wireless device, a dongle may be used.
  • FIG. 1 is a diagram illustrating a master device 200 and a client device 100 to which a method for setting up a mirroring connection according to the present invention is applied.
  • the master device 200 reproduces an image
  • the client device 100 mirrors and reproduces the image received from the master device 200.
  • the master device 200 and the client device 100 are interconnected by a connection device 300.
  • the master device 200 includes a control unit 210, a communication unit 220, an input unit 230, a memory 240, and a display unit 250.
  • the input unit 230 receives a predetermined command or data from a user.
  • the display unit 250 displays a screen reproduced by the control unit 210.
  • the memory 240 stores programs necessary for the master device 200 to operate and data to be transmitted and received.
  • the communication unit 220 transmits data of a screen displayed by the display unit 250 to the client device 100.
  • the communication unit 220 includes a communication port connected to the connection device 300.
  • the control unit 210 performs a display operation of the display unit 250, an operation of processing a command input through the input unit 230, and performs a specific function according to a program stored in the memory 240, and plays back data stored in the memory 240, or General operations such as an operation such as processing and a communication operation with the client device 100 through the communication unit 220 are performed.
  • the client device 100 includes a control unit 110, a communication unit 120, an input unit 130, a memory 140, and a display unit 150.
  • the input unit 130 receives a predetermined command or data from a user.
  • the display unit 150 displays data transmitted from the client device 200 under the control of the controller 110.
  • the memory 140 stores programs necessary for the client device 100 to operate and data to be transmitted and received.
  • the communication unit 120 receives data of a screen displayed by the display unit 250 of the master device 200 from the master device 100.
  • the communication unit 120 includes a communication port connected to the connection device 300.
  • the control unit 110 performs a display operation of the display unit 150, an operation of processing a command input through the input unit 130, and performs a specific function according to a program stored in the memory 140, and reproduces data stored in the memory 140, or General operations such as an operation such as processing and a communication operation with the master device 200 through the communication unit 120 are performed.
  • connection device 300 The master device 200 and the client device 100 are connected by a connection device 300.
  • connection device 300 is composed of, for example, a wired cable
  • communication ports in the communication unit 220 of the master device 200 and communication in the communication unit 120 of the client device 100 are at both ends of the connection device 300
  • Communication ports connected to each port are provided.
  • the connection device 300 is composed of, for example, a dongle capable of wireless communication
  • the dongle is connected to a communication port provided in the communication unit 120 of the client device 100, and wirelessly, the communication unit 220 of the master device 200 ) And data communication.
  • the control unit 110 of the client device 100 detects this and the connection device ( 300) is detected as a connection for mirroring.
  • connection device 300 is configured with an HDMI cable or dongle connected to the HDMI port, and accordingly, the communication port of the communication unit 120 of the client device 100 is configured as an HDMI port. do.
  • HDMI Type-A port is used as a reference.
  • the HDMI (Type-A) port has a total of 19 pins.
  • Pins 1-12 are TMDS-related pins for transmitting and receiving data
  • pin 13 is a CEC (Customer Electronic Control) pin
  • pin 14 is an N/C (No Connected) pin
  • pin 15 is It is a DDC clock pin
  • pin 16 is a DDC data pin
  • pin 17 is a ground pin
  • pin 18 is a power supply pin that supplies +5V power
  • pin 19 is a hot plug detect pin.
  • Example 1 Using the N/C pin of the HDMI port
  • the mirroring pin is configured as a reserved pin.
  • the extra pin means a pin that is not used for data communication, power supply, or clock signal transmission.
  • an N/C (No Connected) pin is used as an extra pin.
  • pin 14 of the HDMI port is an N/C pin.
  • Pin 14 is a pin that is not assigned a specific purpose, and in this embodiment, the connection of the connection device 300 for setting mirroring is sensed using pin 14.
  • FIG. 3 is a diagram illustrating a signal input to pin 14 when a cable is connected to the HDMI port of FIG. 2. Since pin 14 of the HDMI port is not used to transmit a specific signal, even if a cable is connected, a signal is not input to pin 14 of the HDMI port of the client device 100 as shown in FIG. 3.
  • the TMDS signal is input from the master device 200 to the TMDS pins of the HDMI port of the client device 100 as shown in FIG. 3. However, even in this state, the signal is still not input to pin 14. Accordingly, in order to implement the first embodiment of the present invention, a modification must be applied so that a signal can be input to pin 14 of the HDMI port of the client device 100.
  • FIG. 4 is a diagram showing a state in which the HDMI port of FIG. 2 is configured to implement the present invention, and is a view showing pins 14 and 18 of the HDMI port provided in the communication unit 120 of the client device 100 to be.
  • Pin 18 is a power supply pin that supplies +5V power.
  • pin 14 120-14
  • pin 14 is composed of two parts and is separated from each other by being spaced apart by a predetermined distance (d). The two separate parts are insulated from each other.
  • a reinforcing member (not shown) made of a separate insulating material may be provided in the HDMI port so that the No. 14 pin is maintained in a state separated into two parts.
  • the separated end of pin 14 is electrically connected to pin 18 by a separate connection line (L). Therefore, the separated end portion of pin 14 has the same electrical state as pin 18.
  • FIG. 5 is a diagram illustrating a state in which a cable is connected to the HDMI port of FIG. 4. As the cable is connected, pins 1 to 19 of the connection device 300 contact pins 1 to 19 of the HDMI port of the client device 100, respectively. Therefore, as shown in FIG. 5, pin 14 (300-14) and pin 18 (300-18) of the HDMI port of the connector 300 are respectively pin 14 (120-14) of the HDMI port of the client device 100 And are connected to pin 18 (120-18), respectively.
  • the two separated portions of the 14 pins 120-14 of the HDMI port of the client device 100 are interconnected by the 14 pins 300-14 of the connector 300, and as a result, the HDMI port Pin 18 (120-18) and pin 14 (120-14) are short-circuited, and +5V power output from pin 18 (120-18) is supplied to pin 14 (120-14).
  • FIG. 6 is a diagram illustrating a signal input to pin 14 of the HDMI port of FIG. 2 in the state of FIG. 5. As compared with FIG. 3, from the point when the cable is connected to the HDMI port, +5V power output from pin 18 is supplied to pin 14.
  • the controller 110 may detect that +5V power is supplied to pin 14 through the communication unit 120, and accordingly, performs a mirroring state setting operation.
  • connection device 300 when the connection device 300 is connected to the client device 100, the connection of the cable is detected using the N/C pin of the HDMI port, and accordingly, a setting operation for mirroring may be performed.
  • connection for mirroring may be detected even when the master device 200 is not connected and only the connection device 300 is connected.
  • connection device 300 is a wired HDMI cable as well as a wireless dongle, a connection for mirroring may be detected.
  • the mirroring pin is composed of a CEC pin.
  • the CEC pin is the pin 13 of the HDMI port, which enables the control of mutual functions through communication between devices connected with an HDMI cable.
  • a method of including a predefined command as a connection for mirroring in a header block of a data packet input through pin 13 is proposed.
  • the header block of the data packet input through pin 13 consists of a total of 10 bits of data, of which 8 bits is an Information field, 1 bit is an EOM (End of Message) field, and 1 bit is an Ack (Acknowledge) field.
  • Information 8bit is composed of Initiator 4bit, which is the logical address of the device sending the message, and Destination 4bit, which is the logical address of the device receiving the message.
  • the logical address of the header block is defined as 0 for TV, one of 1,2,9 for Recoding device, and one of 3,6,7,10 for Tuner device (Set-top-box), and so on.
  • address 14 is an address whose purpose is not defined, and the second embodiment of the present invention uses it to detect a connection for mirroring.
  • the logical address 14 of the header block is previously defined as a connection for mirroring.
  • the master device 200 writes its own logical address as '14' in the initiator 4bit in the header block of the data packet it sends, and sends it, and the control unit 110 of the client device 100 transmits the If the logical address is '14', it is recognized as a connection for mirroring.
  • Ack is always transmitted as '1'.
  • Ack is '0' if transmission is successful and '1' if transmission is successful when transmitting to one device, and '1' when transmission to all devices is successful in case of transmission to all devices (Broadcasting Message). If transmission fails for some devices, it becomes '0'.
  • the value transmitted by the master device 200 as an initiator is not used when both EOM and Ack are '0', and when EOM is '1' and Ack is '0'. have.
  • a combination of values not used in the EOM/Ack field is used as a signal for mirroring setup. Therefore, when both EOM and Ack are '0', or when EOM is '1' and Ack is '0', it is used as a signal for mirroring setting.
  • the control unit 110 detects that the connection device 300 is connected for mirroring when a signal in which '00' or '10' is set as the value of the EOM/Ack field of the header block is received, and is connected through the connection device 300. Mirroring is set for the master device 200.
  • FIG. 9 is a diagram for explaining another example of a method of using a header block.
  • One bit is added as a field name of'Add' to the header block having the structure as shown in FIG. 8.
  • the controller 120 detects that the connection device 300 is connected to set the mirroring.
  • the master device 200 needs to transmit specific data to pin 13 of the HDMI port of the client device 100 through the connection device 300. Therefore, mirroring setting is possible only when the master device 200 is connected.
  • the client device 100 and the master device 200 must have been promised in advance for a signal for setting mirroring, and the control unit 250 of the master device 200 promised in advance through the communication unit 220 as described above. The signal must be included in the header block and transmitted to the communication unit 120 of the client device 100.
  • the mirroring pin is configured as a Hot Plug Detect pin.
  • the Hot Plug Detect pin is pin 19 of the HDMI port, and is used to transmit a signal that recognizes whether a sink device such as a TV or monitor is turned on to a source such as a DVD or PC. to be.
  • mirroring is set using such a Hot Plug Detect pin.
  • the master device 200 transmits a signal through pin 19 of the HDMI port. Accordingly, the control unit 110 detects that a signal is input to the Hot Plug Detect pin, and performs a mirroring setting operation on the master device 200.
  • FIG. 10 and 11 are views for explaining a third embodiment of the present invention.
  • an activation signal is not input to pin 19 as shown in FIG. 10, and when the master device 200 is connected, the master device 200 is connected as shown in FIG. Pin 19 is activated by the signal transmitted by ). Therefore, in this embodiment, the mirroring setting is possible only when the master device 200 is connected.
  • the client device 100 and the master device 200 must have an appointment to recognize the activation signal of pin 19 as a signal for setting mirroring in advance, and the control unit 250 of the master device 200 is the communication unit 220 The activation signal of pin 19 must be transmitted to the communication unit 120 of the client device 100 through ).
  • the mirroring pin is configured as a pin that transmits a TMDS signal.
  • the TMDS signal transmission pins are pins 1 to 12.
  • pins 10 to 12 used for the clock signal are used among the TMDS pins.
  • mirroring is set using these TMDS pins.
  • the controller 110 detects that a signal is input to the TMDS pin, and performs a mirroring setting operation on the master device 200.
  • FIG. 12 and 13 are views for explaining a fourth embodiment of the present invention.
  • the master device 200 When the master device 200 is not connected and only the connection device 300 is connected, no data is input through the TMDS pin as shown in FIG. 12, and when the master device 200 is connected, the master device ( The data transmitted by 200) is input to the TMDS pin. Therefore, in this embodiment, the mirroring setting is possible only when the master device 200 is connected.
  • the communication unit 120 of the client device 100 may include a plurality of HDMI ports. Each of the HDMI ports may be connected to the master devices 200 in any one of the aforementioned various methods. Accordingly, the client device 100 may establish a mirroring connection to the plurality of master devices 200, and the client device 100 displays a connection status of a mirrorable device of each HDMI port on the display unit 150.
  • FIG. 14 is a diagram illustrating a mirroring state for each communication port displayed on the display unit 150 of the client device 100.
  • a user manipulates the client device 100 by inputting a command to the input unit 130 of the client device 100 using an input device such as a remote control.
  • an input device such as a remote control.
  • the user selects the'Mirroring' item in the'Source' item of the menu, a screen as shown in FIG. 14 is displayed.
  • three HDMI ports (HDMI1, HDMI2, HDMI3) as mirrorable communication ports are shown.
  • the client device 100 separates communication ports connected to one or more master devices 200 in a mirroring manner from other communication ports that are not connected in a mirroring manner, and displays them on the display unit 150.
  • HDMI1 is a communication port to which the master device 200 is not connected
  • HDMI2 and HDMI3 are communication ports to which the master device 200 is connected so that mirroring is possible.
  • HDMI1 is displayed in a color different from that of HDMI2 and HDMI3.
  • HDMI1 is displayed in white, and HDMI2 and HDMI3 are displayed in green. Accordingly, the user can easily recognize whether the respective communication ports classified by color are connected to the master device 200 so that mirroring is possible.
  • the client device 100 displays the display screen of the master device 200 connected to the selected communication port. Display on the display unit 150 of the device 100.
  • FIG. 15 is a diagram illustrating a state in which the display screen of the communication port selected in FIG. 14 is displayed on the display unit 150 of the client device 100.
  • the display screen of the communication port selected in FIG. 14 is displayed on the display unit 150 of the client device 100.
  • the current display screen of the mobile terminal connected to this port is displayed on the display unit 150 of the client device 100.
  • the background screen of the mobile terminal is mirrored and displayed on the display unit 150 of the client device 100 as shown in FIG. 15. do.
  • 16 is a diagram showing this state.
  • the control unit 110 displays a plurality of screens of the display unit 150.
  • Current display screens of several master devices 200 are simultaneously displayed in each area divided into pieces.
  • the user inputs a selection for one of the display screens, only the display screen of the selected master device 200 is displayed on the entire display unit 150, resulting in a state as shown in FIG. 15.
  • a mirroring connection between the master device and the client device is established by connecting a cable to a communication port of a client device such as a TV or LFD or by connecting the cable and the master device. Accordingly, there is no need for a user to manually change the source of the client device every time the master device is changed.
  • the user can easily inquire the communication ports connected to the client device so that the master device can be mirrored, and display the display screen of the connected master device through the display unit of the client by selecting the communication port in the inquiry state. Accordingly, there is an advantage in that the user's convenience for setting and using mirroring is very high.

Abstract

Ce dispositif électronique comprend : une unité de communication ayant un port de communication auquel un dispositif de connexion, pour une connexion en communication de façon à permette une communication de données avec un dispositif maître, est connecté ; et une unité de commande pour mettre en œuvre un réglage à un état connecté, dans lequel le dispositif maître peut être mis en miroir, lorsqu'un signal de réflexion est entré par le dispositif de connexion ou le dispositif maître connecté par l'intermédiaire du dispositif de connexion. L'unité de commande définit une partie de broches dans l'orifice de communication en tant que broches de miroir utilisées pour détecter une connexion pour la mise en miroir. Lorsqu'un signal est entré dans les broches de miroir, l'unité de commande détecte le signal en tant que connexion pour le miroitage.
PCT/KR2020/011300 2019-10-02 2020-08-25 Procédé de réglage d'un état de miroir entre un dispositif maître et un dispositif client, et dispositif électronique pour la mise en œuvre de ce procédé WO2021066324A1 (fr)

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WO2023210851A1 (fr) * 2022-04-27 2023-11-02 엘지전자 주식회사 Dispositif d'affichage et procédé de partage de contenu pour partager un contenu avec un dispositif d'affichage externe

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